/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchy.h
Returns a control's preferred euler angles (local transform rotation)
Returns the current preferred euler angles
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=URigHierarchy) FVector GetControlPreferredEulerAnglesByIndex ( int32 InElementIndex, EEulerRotationOrder InRotationOrder, bool bInitial ) const